GB444361A - Improvements in and relating to methods of testing ferromagnetic substances - Google Patents

Improvements in and relating to methods of testing ferromagnetic substances

Info

Publication number
GB444361A
GB444361A GB6552/35A GB655235A GB444361A GB 444361 A GB444361 A GB 444361A GB 6552/35 A GB6552/35 A GB 6552/35A GB 655235 A GB655235 A GB 655235A GB 444361 A GB444361 A GB 444361A
Authority
GB
United Kingdom
Prior art keywords
march
relating
methods
piece
magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB6552/35A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB444361A publication Critical patent/GB444361A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9006—Details, e.g. in the structure or functioning of sensors

Abstract

444,361. Magnetic tests. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London. March 1, 1935, No. 6552. Convention date, March 1, 1934. Addition to 435,438. [Class 37] The test according tc the parent Specification employing the second differential of a stray field has the core rotating within a stationary coil 2 and composed of two or more parts 3a, 3b eccentrically mounted with respect to and regularly distributed about the rotational axis 4. The ends of the core parts remote from the test-piece may have increased magnetic conductivity, for example, by increasing their cross-section and bringing them closer together, or by providing a magnetic bridge-piece.
GB6552/35A 1934-03-01 1935-03-01 Improvements in and relating to methods of testing ferromagnetic substances Expired GB444361A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE444361X 1934-03-01

Publications (1)

Publication Number Publication Date
GB444361A true GB444361A (en) 1936-03-19

Family

ID=6535198

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6552/35A Expired GB444361A (en) 1934-03-01 1935-03-01 Improvements in and relating to methods of testing ferromagnetic substances

Country Status (1)

Country Link
GB (1) GB444361A (en)

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